Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Bugfix: remove redundancy line

    There is a redundancy line in result page when auto merge.
    We need to remove it.

    Change-Id: I31a754d881584be5a715ddcf6f1f32b25158dfca
    Signed-off-by: grakiss <grakiss.wanglei@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index b3501de..c70193d 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit b3501de5a645f69c705e64345965aab9cd271355
+Subproject commit c70193d65811a8a2a3b50fdad5463bca3643e219